Known as the top-gun of Bollywood, Amitabh Bachchan is one of those rare actors who has ruled the industry for decades now. But there is more to the man beyond his acting skills.

From endorsing brands, doing some fabulous movies to entertaining us even on the small screen, he has been 'the' man who can do anything and everything.

While actors take a hefty amount to promote a cause or a product, Senior Bachchan has been associated with a cause that changed the face of India. And guess what? He didn't even charge a penny for it. It was an advertisement by the Ministry of Health and Family Welfare for the eradication of polio.

Yeah, this ad, we all remember it so well. If it wasn't for this megastar, spreading the word about polio wouldn't have been this easy. India is now polio-free, and a major credit for that goes to Mr. Bachchan.

Calling him a true hero wouldn't be an exaggeration and that's exactly what Bill Gates did. He applauded the Bollywood icon and wrote on Twitter, “Real-world superheroes rarely make the headlines. But what if that wasn't the case? A stirring piece by Bollywood actor @SrBachchan.”

In return, Mr. Bachchan tweeted back saying that he isn't the one to be credited for this work and that he was just the face of the campaign as there were hundreds of people working on it, who made it possible. Bachchan became the UNICEF goodwill ambassador for the polio eradication campaign in India in 2002.

Thank you Mr Gates for this acknowledgement .. the worker is the one who deserves the highest award for the eradication of making India Polio free .. we may have the face and means, but the workers do the "WORK" .. I salute them !!🙏🙏